Binding device



July 21, 1942. R. L. RENNER 2,290,494

- BINDING DEVICE Filed Sept. 19, 1940 INVENTOR W-WMQ ATTORNEY$ Patented July 21 1942 1 BINDING DEVICE Richard L. Renner, Germantown Pike and Skippack Creek, Pa.

Application September 19, 1940, Serial No. 357,338

1 Claim.

This invention has reference to a binder device for securing together certain folded sheets or parts, such as the individual portions of catalogues, to be used particularly where it is desired to assemble and supply to the trade special portions of the catalogue without transmitting the entire bulk of printed matter.

In order that my invention may be better understood, I have shown the same in the accompanying drawing, in which- Figure 1 illustrates a plan view of some assembled sheets connected by my improved binder device;

Figure 2 is a cross-section taken on the line 2--2 of Figure 1;

Figure 3 is another sectional view showing the parts folded up in assembled position;

Figure 4 shows the sheets folded in reverse position to Figure 3; and

Figure 5 is a partial plan view showing the assembled catalogue folder with the binder device shown in two positions, one in full lines and the other in dotted lines.

Essentially this device comprises a bent piece 6 made either of wire or plastic material, the central portion 1 of which is substantially circular but with its ends 8 and 9 formed so as to provide a substantially continuous member, with a gap between the two parts 8 and 9 caused by the offsetting or springing apart of the connecting shoulders l0 and II, so that the resultant central formation will be in substance one portion of a helix.

As indicated in the several figures, I have illustrated two groups of sheets l2 and I3 provided with apertures l4 and I5, which may be of any desired shape and punched by any preferred means, near their edges in such position that when the binder device is, as it were, threaded through them, they will be held in association as indicated in the several figures, with the extended parts 8 and 9 resting in line with or between the edges of the two connected groups of sheets l2 and [3.

In case it is desired to insert additional sheets, or to remove some, the device is disconnected substantially as indicated in Figure 5, the detachment being obtained by reversing the threading action required in assembling.

In applying my improved binder device to the sheets to be connected, I may use perforations at two points along the edges near to each of the upper and lower ends of the sheets, or I may, if desired, use a number of binder devices, depending on the size of the sheets.

I claim.

A loose-leaf ring binder device for sheets or the like having apertures adjacent the margins to be bound, said device comprising a central portion defining a single substantially complete turn of a helix with theends of the turn spaced from each other axially of the helix to an extent sufficient to pass the margins of sheets when the device is being inserted in or removed from binding apertures adjacent said margins, and terminal portions connected with the ends of the helical turn and projecting therefrom axially of the helix in opposite directions away from the mean plane of said turn, the terminal portions being substantially in alignment with each other.

RICHARD L. RENNER. 

